SU1384373A1 - Arrangement for cutting strip material - Google Patents

Abstract

The invention relates to the processing of materials by cutting and can be used to split tools on a flexible base, such as abrasive paper. The goal is to increase the durability of the cutting tool of the device for cutting strip material and to improve its service conditions when cutting abrasive paper. The device comprises a knife 1, a clamp 10 and an elastic roller 12 located on both sides of the knife, and a supporting element 5 made in the form of an elastic (rubber, polyurethane) plate movable in the plane of the knife, divided along the line of interaction with the edge of the knife 6 with a groove 7. The latter has a width exceeding the grain size of the cut leather, and a depth greater than the penetration of the knife 1 into the body of the element 5. The working surface of the elastic roller 12 located on the side of the cut workpiece is set at a distance from the knife 1, equal to or less than the cutting length. This is necessary to push the cut-off block of petals 11 against the surface of the knife 1. 3 sludge. with SS (/ with with 00 4 WITH with

Description

1

The invention relates to the processing of materials by cutting and can be used for dividing a tool on a flexible base, such as abrasive sandpaper.

The purpose of the invention is to increase the durability of the cutting machines, its tooling device for cutting strip material and improving its service conditions when cutting abrasive sandpaper.

FIG. 1 shows a device for cutting a strip material, the initial position, a general view; in fig. 2 is the same in the process of cutting the material; in fig. 3 is a diagram of the initial moment of deformation of the abrasive cloth around the cutting edge of the knife.

A device for cutting a strip material — an abrasive skin — consists of a fixed knife 1 fixed on a beam 2 and a punch 4 movable in the guides 3 to which it is attached, for example, a tape 8. At the process of this movement, the abrasive tape 8 with its non-abrasive layer 13 hits the cutting edge 6 of the knife 1 and under the pressure of the elastic plate 5 bends (breaks)

 around this edge. Elastic clamps, 10, i.e., do not allow to be completely bent along the side surfaces of the knife 1 of the abrasive belt 8. on one side, a rubber band is elastic, and on the other, a block

The 10 cut petals 11 pressed by the elastic roller 12. Thus, the bending of the abrasive years 8 around the cutting edge of the knife 6 acquires the character of a sharp fracture, as a result of which the bond of the abrasive layer 9 of the tape 8 stretches and breaks along the cutting edge 6 of the knife 1, forming This bare portion of the base is on the side opposite to this cutting edge 6. And since the place of the fracture 14 is in the area of the groove 7 of the elasmere is glued, the elastic plate 5 (from a rigid plate 5 of the punch 4, the grains of abkaya rubber, polyurethane, etc. .), performing and the role of the supporting element. The punch 4 is connected to the drive up and down (not shown). In the direction of the cutting edge 6 of the knife 1 in

tape 8, adjacent to the fracture 14, do not meet the resistance, as it were moved apart and unfold at an acute angle to the cutting edge 6 of the knife 1. Further lowering of the punch 4 into the elastic-elastic plate 5 of the punch 4 is made a groove 25 means that the base of the abrasive len 7, the width of which exceeds the maximum grain size of the cut abrasive belt 8, which includes the abrasive layer 9, located on the side of the plate 5, and the depth - the amount of penetration of the knife 1 into the body; the elastics 8 do not withstand the tensile load and break in the direction of cutting 6 minutes knife edge 1, as though stringing Referring to it. In this case, the cutting edge 6 of the knife 1 penetrates into the fracture 14 of the abrasive plate 5. On one side of the knife of the 1st layer 9 of the tape 8, and the grain is 35

A clamp 10 is mounted on the beam 2, which is a strip of, for example, porous rubber glued to the beam 2, and the stiffness of this rubber is lower than the stiffness of the elastic plate 5 of the punch 4. On the other side of the knife 1, there is also an elastic clamp, which The rendition of the design of the mechanism is a cut-off block of petals 11 of the abrasive cloth, pressed against the side surface of the knife 1 by an elastic roller 40, and the working surface of the clamp in the form of an elastic roller 12 is located at a distance from the plane knife 1, equal to or less than the length of the cut piece. This is due to the need

At the edges of the fracture, rub with their edges on the side surfaces of the knife, thereby sharpening it, i.e. The knife 1 is in self-sharpening mode. The dimensions of the groove 7 in the elastic plate 5 prevent the abrasive grains from contacting the edge 6 of the knife 1. After cutting, the separated part of the abrasive belt 8 under the action of the punch 4 and the elasticity of the compressed layer of the elastic plate 5 slides along the side wall of the knife 1 and is laid in a stack of petals 11 that are compressed elastic roller 12. When returning (lifting) the punch 4, the left end of the abrasive belt 8 under the action of the elasticity of the clamp 10 rises and is set at the level of the cutting edge b

pushing the cut-off block of petals 11 to the knife 1, allowing the mechanism of dimensional feed of the knife surface 1. to carry out the next advancement of the work. The work is carried out as follows to the cutting zone. Next, the described cycle is repeated.

Claims (1)

Abrasive belt 8 in the period when the punch 4 is in the extreme upper margin, the invention Formula, is fed into the gap between the punch 4 and the fixed knife 1 by an amount equal to the length of the cut cheek. The feeding of the abrasive belt 8 is performed by a dimensional feeding mechanism (not shown). The next time, under the action of a reciprocating drive (not shown), punch 4 begins its movement downward, pulling the device for cutting a strip material of predominantly abrasive cloth, containing a base, a knife with clamps located on both sides of it, supporting an element and a step-by-step feed mechanism, characterized in that, in order to increase the durability of the cutting tool and to improve the service conditions. tape 8. In the process of this movement, the abrasive tape 8 with its non-abrasive layer 13 hits the cutting edge 6 of the knife 1 and under the pressure of the elastic plate 5 bends (breaks) around this edge. Elastic clamps, 10, i.e., do not allow to be completely bent along the side surfaces of the knife 1 of the abrasive belt 8. on one side, a rubber band is elastic, and on the other, a block cut petals 11, pressed by elastic roller 12. Thus, the bend of the abrasive years 8 around the cutting edge of the knife 6 acquires the character of a sharp fracture, as a result of which the bond of the abrasive layer 9 of the tape 8 stretches and breaks along the cutting edge 6 of the knife 1, thus forming the bare portion of the base on the side opposite to this cutting edge 6. And since the place of fracture 14 is in the area of the groove 7 of the elastic plate 5 of the punch 4, the grains of the abrasive belt 8 adjacent to the fracture 14 do not meet the resistance, as if pushing C and unfold at an acute angle to the cutting edge 6 of the knife 1. Further lowering of the punch 4 leads to the fact that the base of the abrasive landit causes the base of the abrasive belt 8 not to withstand the tensile load and breaks in the direction of the cutting edge 6 of the knife 1, as- would string on it. At the same time, the cutting edge 6 of the knife 1 penetrates into the fracture 14 of the abrasive layer 9 of the tape 8, and the grains found 5 0 At the edges of the fracture, rub with their edges on the side surfaces of the knife, thereby sharpening it, i.e. The knife 1 is in self-sharpening mode. The dimensions of the groove 7 in the elastic plate 5 prevent the abrasive grains from contacting the edge 6 of the knife 1. After cutting, the separated part of the abrasive belt 8 under the action of the punch 4 and the elasticity of the compressed layer of the elastic plate 5 slides along the side wall of the knife 1 and is laid in a stack of petals 11 that are compressed elastic roller 12. When returning (lifting) the punch 4, the left end of the abrasive belt 8 under the action of the elasticity of the clamp 10 rises and is set at the level of the cutting edge b  knife 1, allowing the dimensional feed mechanism to carry out the next promotion of the formula of the invention A device for cutting a strip material of predominantly abrasive pelt, comprising a base, a knife with clamps located on either side of it, a support element and a step-by-step strip feeding mechanism, characterized in that in order to increase the durability of the cutting tool and improve the service conditions. the supporting element is designed as a plate made of an elastic material with a groove installed in the plane of the cut, and the clamp, located on the side of the cut piece, is set from the plane of the cut at a distance of no more than the feed step. Iti Phi. 2